Last time i went through this, maybe 5 years ago i went throught the same deal with switches. One thing that makes a big difference is the placement of the fan switch. if you put the fan switch up in the intake and the temp switch down in the head you will get a big difference in temp readings. If you place them side by side in the same water stream they work alot closer to the same temp.

The reason i wanted a 180 switch is for drag racing to keep the engine cool. thinking about it i might use a 190 switch and just manually over ride it when i race. If i can find a switch that actually comes on at 190 deg. L.O.L.

I guess i need to make a trip to the NAPA and fight with the parts guy, they are really un-cool around here when it comes to this stuff.

Tell them that you want to look at Standard Parts #TX61. It's a part number that fits most Ford products - no clue on temp setting, but a guess would be 195* or a bit more. Another would be a TX89 which would fit most GM's.

If you are talking about the NAPA store near the York County fairgrounds - not impressed. But neither am I impressed with our local NAPA stores either - which is why I most often use a nearby mom and pop store for my parts "challenges". NAPA takes the attitude here that if it isn't listed for a particular car, they have no clue as it isn't in the computer base.

We use this controller on all of our builds & we love them. It is adjustable with pipe-threaded sender that you can install in a water jacket in the intake manifold or block or even in a bung we install in the radiator. They can be set to activate a fan or fans anywhere between 150-240º F with a 15° cycle meaning it will shut the fan(s) down once the temp drops 15º from activation setting. They also have a A/C overide circuit as well which can be used with A/C or a toggle mounted in cockpit for manual activation.

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